US8184285B2 - Method and apparatus using volume holographic wavelength blockers - Google Patents
Method and apparatus using volume holographic wavelength blockers Download PDFInfo
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- US8184285B2 US8184285B2 US13/157,265 US201113157265A US8184285B2 US 8184285 B2 US8184285 B2 US 8184285B2 US 201113157265 A US201113157265 A US 201113157265A US 8184285 B2 US8184285 B2 US 8184285B2
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- filter assembly
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- grating
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Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/02—Details
- G01J3/0205—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
- G01J3/0227—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows using notch filters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
- G01J3/44—Raman spectrometry; Scattering spectrometry ; Fluorescence spectrometry
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/32—Holograms used as optical elements
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/02—Details of features involved during the holographic process; Replication of holograms without interference recording
- G03H1/024—Hologram nature or properties
- G03H1/0248—Volume holograms
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- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Spectrometry And Color Measurement (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
Description
λB=λo·cos(Θ), (1)
where λo=2·n·Λ is the anti-parallel diffraction wavelength where n the index of refraction.
where Θx−ΘM is the angle between z-axis and {right arrow over (k)} and ΘM the angle between surface normal and {right arrow over (k)} measured inside the medium. After rotation of the VHG around the x-axis by an angle Θx, and around the surface normal by angle ω, the VHG's grating vector {right arrow over (K)} is:
λB=λ0 cos(φ)(cos(ΘM)+sin(ΘM)sin(ω)tan(φ)). (4)
TABLE 1 |
Measured anti-parallel diffraction wavelength λo,i , slant angle φi |
and peak diffraction efficiency η for 6 gratings. Also given |
is the normal incidence wavelength λo,i cos(φi), which determines the |
tuning range of the final stack. The average normal incidence |
wavelength λo,i cos(φi) is (785.84 ± 0.069) nm. |
VHG # | λo,i [nm] | φi [deg] | λo,i cos(φi) [nm] | η [%] |
1 | 785.96 | +0.94 | 785.85 | 93 |
2 | 786.04 | −1.02 | 785.92 | 92 |
3 | 786.10 | +1.50 | 785.83 | 95 |
4 | 786.18 | −1.50 | 785.91 | 91 |
5 | 786.32 | +2.02 | 785.83 | 92 |
6 | 786.20 | −1.99 | 785.73 | 91 |
Claims (31)
Priority Applications (1)
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US13/157,265 US8184285B2 (en) | 2008-08-04 | 2011-06-09 | Method and apparatus using volume holographic wavelength blockers |
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US13787108P | 2008-08-04 | 2008-08-04 | |
US12/315,470 US7986407B2 (en) | 2008-08-04 | 2008-12-03 | Method and apparatus using volume holographic wavelength blockers |
US13/157,265 US8184285B2 (en) | 2008-08-04 | 2011-06-09 | Method and apparatus using volume holographic wavelength blockers |
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US12/315,470 Continuation US7986407B2 (en) | 2008-08-04 | 2008-12-03 | Method and apparatus using volume holographic wavelength blockers |
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US20120002197A1 US20120002197A1 (en) | 2012-01-05 |
US8184285B2 true US8184285B2 (en) | 2012-05-22 |
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US12/315,470 Active 2029-09-06 US7986407B2 (en) | 2008-08-04 | 2008-12-03 | Method and apparatus using volume holographic wavelength blockers |
US13/157,265 Active US8184285B2 (en) | 2008-08-04 | 2011-06-09 | Method and apparatus using volume holographic wavelength blockers |
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US8049885B1 (en) | 2008-05-15 | 2011-11-01 | Ondax, Inc. | Method and apparatus for large spectral coverage measurement of volume holographic gratings |
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